Testing method for moisture content of insulating oil
A detection method and insulating oil technology, which is applied in the field of transformers, can solve the problem that insulating oil cannot be recycled, and achieve the effects of high degree of automation, improved precision, and easy operation
Active Publication Date: 2022-01-25
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0004] This application provides a method for detecting the moisture content of insulating oil to solve the problem that the insulating oil cannot be recycled after the moisture content is measured
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[0026] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0027] The terahertz signal has strong penetrating power. The continuous scanning terahertz imaging can detect the intensity information of the electromagnetic wave passing through the sample or reflected by the sample. It has high radiation power, simple system, low price, fast imaging speed and easy to use. Features. The absorption of tera...
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The embodiment of the present application provides a method for detecting the moisture content of insulating oil. The method includes setting a two-dimensional mobile platform between the terahertz laser and the terahertz detector, and the two-dimensional mobile platform is provided with insulating oil samples; The Hertz laser sends terahertz waves to the insulating oil sample; the insulating oil sample is controlled to move on the preset focal plane through a two-dimensional mobile platform; according to the terahertz data of multiple sites in the insulating oil sample received by the terahertz detector, Calculate the transfer function of the site; express the transfer function of multiple sites in the insulating oil sample with preset colors, and obtain the terahertz scanning image of the insulating oil sample; compare the terahertz scanning image with the insulating oil terahertz image database Match to obtain the insulating oil moisture content of the insulating oil sample. The present application uses terahertz imaging technology to detect the moisture content of insulating oil, which can realize non-destructive testing, and has the advantages of high accuracy, high degree of automation, and environmental friendliness.
Description
technical field [0001] The present application relates to the technical field of transformers, in particular to a method for detecting moisture content of insulating oil. Background technique [0002] The oil-immersed transformer is filled with insulating oil, which can play the role of insulation, heat dissipation and arc extinguishing. Monitoring the insulating oil is an important means to ensure the normal operation of the transformer. Moisture is one of the important indicators for monitoring the quality of insulating oil. The source of moisture in transformers is mainly the intrusion of moisture in the atmosphere into the oil from the outside of the equipment, the infiltration of moisture absorbed by the cellulose of the insulating material into the oil, or the aging and decomposition of cellulose. Moisture gets into the oil. During the operation of the transformer, as long as there is a small amount of moisture in the insulating oil, it will cause great harm to the e...
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IPC IPC(8): G01N21/3586
CPCG01N21/3586
Inventor 李宗红刘荣海孔旭晖郭新良杨迎春郑欣何运华周静波虞鸿江焦宗寒陈国坤代克顺许宏伟
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST